Portable sander tool



ay 1951 M. H. WICKMAN 2,554,763

PORTABLE SANDER TOOL Filed July 14, 1 950 IN V EN TOR. Nag/w: h. Wale/v4 WzaW fir FUE/YE Y Patented May 29, 1951 UNITED STATES PATENT OFFICE 7 Claims. 1 This invention relates to portable grinders and polishers of the rotary type which are adapted particularly for polishing articles of wood.

Heretofore, all of the portable grinding and polishing tools were incapable of being held in the proper grinding or polishing position with respect to surface being polished, etc. It is necessary during the grinding or polishing operation to exert uniform pressure on the tool so that rapid and proper polishing of the surface is accomplished. I have devised a simple and efiective means of holding a grinding tool in the proper grinding position to easily and readily grind or polish a surface in a proper and accurate manner.

One object of my invention is to provide a sander tool which will be operative for quickly and efliciently polishing or grinding any desired surface.

Another object of the invention is to provide a novel handle means on the outer end of a sander tool whereby the tool may be more readily manipulated for efiicient operation.

A further object of the invention is to provide in a portable sander or polishing tool a removable abrasive sleeve and means for securely holding the sleeve on a spindle of the tool.

Other objects of the invention, not specifically mentioned hereinbefore, will become apparent during the course of the following description.

In the drawings:

Figure 1 is a side elevational view of the sander tool suitably mounted in the socket of a hand drill and shown in polishing position on a piece of work.

Figure 2 is sectional view taken on line 22 of Figure 1, showing the spindle of the tool with the abrasive sleeve thereon.

Figure 3 is an elevational view of the sander tool, parts in section, parts broken away, showing the novel handle of the tool.

Figure 4 is a sectional view taken on line 4-4 of Figure 3 showing the looking or securing means for the removable abrasive sleeve.

Figure 5 is a sectional view taken on line 55 of Figure 3, disclosing the bearing means for the handle of the tool and means for maintaining the handle on the shaft of the tool.

Referring specifically to the drawings wherein like reference characters designate like or similar parts, a sander tool is shown generally at ID. A suitable power means l2 such as a portable power driven hand drill is adapted as the means for actuating the sander tool H]. A portion of a shaft of the sander tool is coupled by means of a chuck of the hand drill to the hand drill l2.

The sander tool comprises a metal shaft l4 having a wooden spindle l6 appropriately fixedly secured thereto with the ends of the shaft [4 extending beyond the ends of the spindle 16. One end of shaft is, the right end, see Figures 1 and 3 of the drawings, is adapted to be secured into a chuck of the hand drill l2 whereby the sander tool If] may be rotated. The left end of the shaft I l, see Figure 3 of the drawings, is provided with a circumferential groove [8. A handle 26 provided with a socket in its inner end and having a metal sleeve 24 carried in the socket 22 is freely mounted on the left end of the shaft Hi, see Figures 1 and 3 of the drawings with the metal sleeve as acting as a bearing for the end :5 of the shaft l4. A small screw 26 is mounted in aligned holes in the sides of the handle 20 and bearing sleeve 24 with its inner end extending into the circumferential groove 18 of shaft M to hold handle 20 on the end I5 of the shaft It.

The end ll of the spindle I6 is provided with a circumferentially enlarged portion 19 which is tapered outwardly with respect to axis of the spindle 16. A circumferential recess 2| is formed in the tapered portion [9 of the spindle l6 and two tabs of abrasive material 23 are mounted in the recess 2 I each of which is spaced diametrically from the other. A cylindrically shaped sleeve 28 of abrasive material, such as sand paper is removably secured to the outer surface of the spindle l6. The tapered portion E9 of spindle l6 and the abrasive tabs 23 tightly engage the inside of the abrasive sleeve 28 at end I! of the spindle l6 securely holding the abrasive sleeve 28 on the spindle [6 during the grinding and polishing operations of the sander tool II].

In the operation of the sander tool II), the free and of the shaft M is securely fastened in the chuck of the power driven hand drill E2. The hand drill I2 with the sander tool l0 mounted thereon is easily and readily portable for use in grinding pieces of metal or articles of wood such as the article of wood ill, see Figures 1 and 2 of the drawings. The user of the sander tool I0 holds the power driven drill device l2 in his right hand with his left hand engaging the handle 20, and the left hand can manipulate and guide the abrading sleeve 28 mounted on the spindle l6 into the proper contact with piece of work GB for quick and efiicient grinding or polishing of the article of wood it. The drill device i2 will rotate the spindle Hi and its abrading sleeve 28 for grinding or polishing any desired surface such as surface 42 of the wood article 40. The handle 20 provides a convenient means for guiding the tool In over the surface being polished and also for giving it the proper abrasive contact with surface of the work. The metal sleeve 24 in handle 20 provides a convenient and efficient bearing means for the end l of shaft 14.

The removable abrasive sleeve 28 is securely held on the surface of spindle l6 under all ordinary operating conditions of the sander tool If! by means of the tapered portion I9 and its abrasive tabs 23 on the end I! of the spindle 16. The abrasive sleeve 28 after use in grinding and polishing of surfaces of articles of wood, etc. becomes worn so that a new abrasive sleeve would be needed. So to remove the worn abrasive sleeve 28 .from the spindle E6 the end of handle 28 is engaged with a rigid object and then holding the sleeve 28 in the hand and pulling downward on the abrasive sleeve 28 toward the rigid objector surface loosens the sleeve 28 from the tapered surface is with its abrasive tabs 23 of the spindle It so that worn abrasive sleeve 28 can be removed off the handle end of spindle l6. It will be evident that a new abrasive sleeve 28 can be mounted on the spindle I6 by being pushed over handle 26 onto the spindle l6 until the right end of the new abrasive sleeve 28 tightly engages the tapered portion ill with its abrasive tabs 23 of the end H of spindle l6, see Figure 3 of the drawings.

It is to be understood that the abrasive sleeve 28 can be made of any material such as sandpaper, emery cloth, any grit, or the like.

From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art, that this invention provides a simple, but highly practical sander tool which is easily controlled for rapid and efficient grinding and polishing operations.

Various changes may be resorted to, provided they fall within the spirit and scope of the invention as defined by the appended claims.

I claim as my invention:

1. A sander tool of the class described comprising a shaft, a spindle fixedly mounted on the shaft with the ends of the shaft extending beyond the ends of the spindle, a circumferentially outwardly tapered portion with respect to the axis of th spindle formed on one end of the spindle having a circumferential recess formed therein, two abrasive tabs diametrically spaced from each other mounted in the circumferential recess of the tapered portion of the spindle, and an abrasive sleeve mounted on the spindle with the tapered portion of the spindle and its diametrically spaced abrasive tabs normally engaging and holding the abrasive sleeve on the spindle.

2. A portable sander tool of the class described comprising a shaft, a spindle fixedly mounted on the shaft with the ends of the shaft extending beyond the ends of the spindle, a circumferentially outwardly tapered portion with respect to the axis of the spindle formed on one end of the spindle and provided with a circumferential recess, two abrasive tabs spaced diametrically from each other mounted in the recess in the tapered portion of the spindle, an abrasive sleeve mounted on the spindle with the tapered portion and its diametrically spaced abrasive tabs normally engaging and holding the abrasive sleeve on the spindle, and a handle provided with a bearing member freely mounted on the one end of the shaft.

3. A portable sander tool of the class described comprising a shaft, a spindle fixedly mounted on the shaft with the ends of the shaft extending beyond the ends of the spindle, a circumferentially outwardly tapered portion with respect to the axis of the spindle formed on one end of the spindle provided with a circumferential recess, two abrasive tabs diametrically spaced from each other mounted in the circumferential recess formed in the tapered portion of the spindle, an abrasive sleeve mounted on the spindle with the tapered portion and its diametrically spaced abrasive tabs normally engaging and holding the abrasive sleeve on the spindle, a handle provided with a bearing member freely mounted on the one end of the shaft, and an electric power means adapted to engage the opposite end of the shaft for actuating the tool.

4. A sander tool of the class described comprising a shaft, a spindle fixedly mounted on the shaft, a circumferentially outwardly tapered portion with respect to the axis of the spindle formed on one end of the spindle having a circumferential recess formed therein, a plurality of spaced apart from each other abrasive tabs mounted in the circumferential recess of the tapered portion of the spindle, and an abrasive sleeve mounted on the spindle with the tapered portion of the spindle and its plurality of abrasive tabs normally engaging and holding the abrasive sleeve on the spindle.

5. A sander tool of the class described comprising a shaft, a spindle fixedly mounted on the shaft, a circumferentially outwardly tapered portion with respect to the axis of the spindle formed on one end of the spindle having a circumferential recess formed therein, abrasive means mounted in the circumferential recess of the tapered portion of the spindle and an abrasive sleeve mounted on the spindle with the tapered portion of the spindle and its abrasive means normally engaging and holding the abrasive sleeve on the spindle.

6. A sander tool of the class described comprising a shaft, a spindle fixedly mounted on the shaft, an enlarged portion formed on one end of the spindle, abrasive means mounted on the enlarged portion of the spindle and an abrasive sleeve mounted on the spindle with the enlarged portion of the spindle and its abrasive means normally engaging and holding the abrasive sleeve on the spindle.

'7. A sander tool of the class described comprising a shaft, a substantially cylindrically shaped spindle fixedly mounted on the shaft, a circumferentially outwardly tapered portion with respect to the axis of the spindle formed on one end of the spindle, abrasive means mounted on the tapered portion of the spindle and an abrasive sleeve mounted on the spindle with the tapered portion of the spindle and its abrasive means normally engaging and holding the abrasive sleeve on the spindle.

MAGNUS H. WICKMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 819,578 McCoy May 1, 1906 1,646,852 Carnowsky et al. Oct. 25, 1927 2,286,292 Mall June 16, 1942 FOREIGN PATENTS Number Country Date 420,922 Germany Oct. 26, 1924 

